Year	Number of
1990	1422.02
1991	1464.94
1992	1512.77
1993	1563.13
1994	1635.31
1995	1724.93
1996	1814
1997	1914.78
1998	2024.19
1999	2142.18
2000	2257.21
2001	2360.6
2002	2452.27
2003	2537.95
2004	2610.58
2005	2678.69
2006	2731.5
2007	2784.1
2008	2844.03
2009	2910.91
2010	2972.08
2011	3014.77
2012	3053.25
2013	3094.07
2014	3133.59
2015	3173.93
2016	3213.25